WAEC Biology Past Questions & Answers - Page 154

766.

Which of the following factors is likely to increase the rate of transpiration in plants?

A.

A reduction in the number of stomata per unit surface area

B.

Increase in humidity around the leaves of plants

C.

An increase in leaf surface area to volume ratio

D.

Removing leaves from plants

Correct answer is C

No explanation has been provided for this answer.

767.

The transportation of water and mineral salts through the xylem vessels is enhanced because the xylem cells are

A.

thickened with lignin

B.

long, narrow tubes placed end to end

C.

close to the endodermis

D.

centrally placed in the roots

Correct answer is B

No explanation has been provided for this answer.

768.

The process by which plants manufacture food from carbon dioxide and water using energy from the sun is called

A.

chemosynthesis

B.

photosynthesis

C.

anabolism

D.

catabolism

Correct answer is B

No explanation has been provided for this answer.

769.

The resolution of a microscope refers to its power to

A.

increase an object's apparent size

B.

distinguish clearly between two objects

C.

scan the surface of an object

D.

focus on an object

Correct answer is A

No explanation has been provided for this answer.

770.

Which of the following structures is not essential in a wind pollinated flower?

A.

Anther

B.

Ovary

C.

Stigma

D.

Petal

Correct answer is D

No explanation has been provided for this answer.